Leading shares are in positive territory ahead of the US Federal Reserve’s latest interest rate decision and following reports of a major boost to the Japanese economy by the country’s government. Stronger than expected UK GDP growth of 0.6% in the second quarter has also helped support the market.

But outsourcing group Capita is missing out, falling 22p or 2% to 967p after it warned the Brexit vote was having negative effects on its business. Chief executive Andy Parker said:

While it is too early to know the impact of the recent EU referendum, it has created uncertainty, particularly in the financial services sector, and we are continuing to experience some delays in decision making in the short term.

But it said it hoped that would be offset by further opportunities in the medium term. Half year profits roe by 8% to £285.3m on revenues up 5%. The bid pipeline rose from £4.7bn to £5.1bn. Stifel analyst Caroline de La Soujeole said:

Headline numbers a touch ahead of consensus (2% beat at earnings per share level) with organic sales growth of 5%, return on capital employed stable and cash flow improving. However the outlook statement strikes a cautious tone for the remainder of the year noting increased uncertainty following the EU referendum and delays in decision making.

[The] outlook statement highlights increased uncertainty created from the Leave vote resulting in delays in decision making in the short-term particularly in the financial services sector. The company expects this to be more than offset by increased medium-term incremental opportunities. We are more circumspect.

The stock has underperformed the FTSE All Share by 8% over the past month and 7% on a 3 month view reflecting investor concern over the likely impact of Brexit on tendering activity. In light of today’s statement this seems to have been warranted.

Overall the FTSE 100 is currently up 14.66 points at 6738.69.

ITV is the biggest riser, up 15.1p to 199.9p after its results, while Taylor Wimpey is leading housebuilders higher after recent share price weakness on Brexit worries. Taylor Wimpey is up 6.3p at 151.2p as it said the referendum result had yet to impact demand. Barratt Development is 15.6p better at 420.9p while Persimmon has put on 57p to £16.45.

Elsewhere St James’s Place has added 27p to 911p after the wealth manager reported a better than expected 15% rise in net inflows to £3.1bn.

But a recent dip in the gold and silver price has left Fresnillo down 31p at £18.36 and Randgold Resources 135p lower at £85.50.

Among the mid-caps cigarette filter maker Essentra is down after JP Morgan cut from overweight to neutral.